unix: Make -c option parse input script as a file, as per CPython.
unix: Make -c option parse input script as a file, as per CPython.

Addresses issue #915.

misterdanb/micropython,aethaniel/micropython,cwyark/micropython,vitiral/micropython,xyb/micropython,xuxiaoxin/micropython,jmarcelino/pycom-micropython,lowRISC/micropython,TDAbboud/micropython,MrSurly/micropython-esp32,KISSMonX/micropython,ganshun666/micropython,torwag/micropython,MrSurly/micropython-esp32,dinau/micropython,dmazzella/micropython,henriknelson/micropython,supergis/micropython,dinau/micropython,jimkmc/micropython,mpalomer/micropython,trezor/micropython,adafruit/circuitpython,jimkmc/micropython,methoxid/micropystat,jlillest/micropython,HenrikSolver/micropython,selste/micropython,PappaPeppar/micropython,xyb/micropython,HenrikSolver/micropython,dmazzella/micropython,kostyll/micropython,ernesto-g/micropython,drrk/micropython,mgyenik/micropython,toolmacher/micropython,paul-xxx/micropython,ChuckM/micropython,ganshun666/micropython,swegener/micropython,pozetroninc/micropython,adamkh/micropython,heisewangluo/micropython,ruffy91/micropython,dhylands/micropython,martinribelotta/micropython,adamkh/micropython,dhylands/micropython,bvernoux/micropython,praemdonck/micropython,martinribelotta/micropython,vitiral/micropython,jmarcelino/pycom-micropython,ryannathans/micropython,Peetz0r/micropython-esp32,galenhz/micropython,pfalcon/micropython,tdautc19841202/micropython,noahchense/micropython,adafruit/micropython,cnoviello/micropython,vriera/micropython,vriera/micropython,Peetz0r/micropython-esp32,slzatz/micropython,kerneltask/micropython,firstval/micropython,blazewicz/micropython,methoxid/micropystat,matthewelse/micropython,lbattraw/micropython,oopy/micropython,cnoviello/micropython,AriZuu/micropython,ahotam/micropython,dxxb/micropython,swegener/micropython,jimkmc/micropython,dhylands/micropython,ericsnowcurrently/micropython,neilh10/micropython,torwag/micropython,bvernoux/micropython,mpalomer/micropython,xhat/micropython,lbattraw/micropython,infinnovation/micropython,vriera/micropython,omtinez/micropython,emfcamp/micropython,micropython/micropython-esp32,methoxid/micropystat,skybird6672/micropython,xyb/micropython,pfalcon/micropython,suda/micropython,methoxid/micropystat,pramasoul/micropython,tobbad/micropython,xuxiaoxin/micropython,deshipu/micropython,mianos/micropython,ChuckM/micropython,matthewelse/micropython,HenrikSolver/micropython,pramasoul/micropython,omtinez/micropython,cloudformdesign/micropython,Timmenem/micropython,firstval/micropython,swegener/micropython,lowRISC/micropython,alex-march/micropython,praemdonck/micropython,warner83/micropython,supergis/micropython,jimkmc/micropython,dxxb/micropython,selste/micropython,tdautc19841202/micropython,omtinez/micropython,kostyll/micropython,hosaka/micropython,EcmaXp/micropython,TDAbboud/micropython,orionrobots/micropython,emfcamp/micropython,rubencabrera/micropython,ahotam/micropython,hiway/micropython,oopy/micropython,supergis/micropython,suda/micropython,SHA2017-badge/micropython-esp32,cwyark/micropython,danicampora/micropython,cwyark/micropython,chrisdearman/micropython,bvernoux/micropython,adafruit/circuitpython,hiway/micropython,mpalomer/micropython,adafruit/circuitpython,tobbad/micropython,turbinenreiter/micropython,TDAbboud/micropython,danicampora/micropython,ChuckM/micropython,dhylands/micropython,galenhz/micropython,alex-march/micropython,matthewelse/micropython,slzatz/micropython,vitiral/micropython,lbattraw/micropython,orionrobots/micropython,suda/micropython,pozetroninc/micropython,chrisdearman/micropython,adamkh/micropython,hiway/micropython,turbinenreiter/micropython,oopy/micropython,ericsnowcurrently/micropython,PappaPeppar/micropython,jlillest/micropython,cwyark/micropython,puuu/micropython,matthewelse/micropython,slzatz/micropython,pozetroninc/micropython,AriZuu/micropython,SHA2017-badge/micropython-esp32,orionrobots/micropython,Vogtinator/micropython,ceramos/micropython,xhat/micropython,MrSurly/micropython-esp32,puuu/micropython,infinnovation/micropython,redbear/micropython,torwag/micropython,paul-xxx/micropython,warner83/micropython,noahwilliamsson/micropython,ChuckM/micropython,aethaniel/micropython,PappaPeppar/micropython,dinau/micropython,dxxb/micropython,dxxb/micropython,ruffy91/micropython,stonegithubs/micropython,ernesto-g/micropython,Peetz0r/micropython-esp32,paul-xxx/micropython,HenrikSolver/micropython,alex-march/micropython,kerneltask/micropython,redbear/micropython,cloudformdesign/micropython,infinnovation/micropython,KISSMonX/micropython,neilh10/micropython,lowRISC/micropython,praemdonck/micropython,ericsnowcurrently/micropython,Timmenem/micropython,dhylands/micropython,tuc-osg/micropython,SungEun-Steve-Kim/test-mp,tralamazza/micropython,EcmaXp/micropython,xhat/micropython,ryannathans/micropython,misterdanb/micropython,KISSMonX/micropython,EcmaXp/micropython,ganshun666/micropython,ahotam/micropython,PappaPeppar/micropython,torwag/micropython,jlillest/micropython,tralamazza/micropython,kerneltask/micropython,ahotam/micropython,orionrobots/micropython,blazewicz/micropython,MrSurly/micropython,ceramos/micropython,drrk/micropython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,utopiaprince/micropython,dinau/micropython,mianos/micropython,cloudformdesign/micropython,toolmacher/micropython,firstval/micropython,hosaka/micropython,tuc-osg/micropython,skybird6672/micropython,mgyenik/micropython,skybird6672/micropython,heisewangluo/micropython,Vogtinator/micropython,trezor/micropython,dinau/micropython,redbear/micropython,MrSurly/micropython-esp32,ganshun666/micropython,pramasoul/micropython,heisewangluo/micropython,trezor/micropython,micropython/micropython-esp32,noahwilliamsson/micropython,blazewicz/micropython,turbinenreiter/micropython,feilongfl/micropython,chrisdearman/micropython,mhoffma/micropython,hiway/micropython,paul-xxx/micropython,chrisdearman/micropython,tobbad/micropython,ganshun666/micropython,stonegithubs/micropython,heisewangluo/micropython,henriknelson/micropython,orionrobots/micropython,micropython/micropython-esp32,xuxiaoxin/micropython,hosaka/micropython,dmazzella/micropython,jmarcelino/pycom-micropython,micropython/micropython-esp32,tobbad/micropython,ruffy91/micropython,adafruit/micropython,PappaPeppar/micropython,matthewelse/micropython,feilongfl/micropython,vriera/micropython,redbear/micropython